Bussigny-sur-Oron is a former municipality in the district of Lavaux-Oron of the Canton of Vaud, Switzerland. The municipalities of Bussigny-sur-Oron, Châtillens, Chesalles-sur-Oron, Ecoteaux, Oron-la-Ville, Oron-le-Châtel, Palézieux, Les Tavernes, Les Thioleyres and Vuibroye merged on 1 January 2012 into the new municipality of Oron.
Bussigny-sur-Oron is first mentioned in 1433 as Bussignye. In 1517 it was mentioned in a land registry of Count Jean II de Gruyère.
Bussigny-sur-Oron has an area, , of . Of this area, or 79.3% is used for agricultural purposes, while or 13.8% is forested. Of the rest of the land, or 8.6% is settled (buildings or roads).
Of the built up area, housing and buildings made up 3.4% and transportation infrastructure made up 4.3%. Out of the forested land, all of the forested land area is covered with heavy forests. Of the agricultural land, 30.2% is used for growing crops and 47.4% is pastures, while 1.7% is used for orchards or vine crops.
The municipality was part of the Oron District until it was dissolved on 31 August 2006, and Bussigny-sur-Oron became part of the new district of Lavaux-Oron.
The small municipality is located near the Lausanne-Bulle road along the Mionnaz river.
The municipalities of Bussigny-sur-Oron, Châtillens, Chesalles-sur-Oron, Ecoteaux, Oron-la-Ville, Oron-le-Châtel, Palézieux, Les Tavernes, Les Thioleyres and Vuibroye are seeking approval from the Canton to merge on 1 January 2012 into the new municipality of Oron.
The blazon of the municipal coat of arms is Per pale, 1. Azure, two mullets of five above a crescent upward Or; 2. Or, a kid rampant Sable, langued Gules, horned and lined Argent.
Bussigny-sur-Oron has a population () of 77. , 6.8% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of 25.4%. It has changed at a rate of 20.6% due to migration and at a rate of 1.6% due to births and deaths.
Most of the population () speaks French (60 or 89.6%), with German being second most common (5 or 7.